Base for assay-balances and the like.



W. HBUSSER. BASE FOR ASSAY BALANCBS AND THE LIKE.

APPLICATION FILED DEG. 20, 1913.

Patented July 28, 1914 I N VEN T 0R ii k WITNESSES:

A TTORNE Y.'

THE NURRIS PETERS C0.. PHDTO-LITHO., WASHlNnmN, n. c.

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BILSE FOR ASSAY-BALANCES AND THE LIKE,

ino-aser.

Specification of Letters Patent.

Patented July 28,1914.

Application led December 20, 1913. Serial No. 808,048;

To all Lc/icm t may concern q Be it known that I, VViLiiniD Hanssen, acitizen of the Republic of Switzerland, residing at Salt Lake City, inthe countyof Salt Lake and State of Utah, have invented certain new anduseful Improvements in Bases for Assay-Balances and ,tlie;,like, ofwhich .the following is aspeciiication.

My invention relates to base plates for balances and like instruments,and has for its object to provide a base or bottomfor balances uponwhich the protecting case and the balance may be rigidly and accuratelysecured.

A further object is to provide a base that will not be affected byclimatic conditions and expand, contract or warp to such an extent as toaffect the perfect working of the different parts or the accuracy of theinstrument.

These objects I accomplish with the device illustrated in theaccompanying drawings in which similar letters of reference indicatelike parts throughout the several figures and as described in thespecification forming a part of this application and pointed out in theappendedclaims.

In the drawings in which I have shown a substantial embodiment of myinvention,`

Figure l is a view in perspective of the device, parts cut away, showingthe upper and front sides, with portions of the protecting case. Fig. 2is a view in perspective of the under and rear sides of the device.Fig.k 3 is a vertical section on line m of Fig. 1. Fig. 4 is a verticalsection on line y g/ of Fig. 3. Fig. 5 is a longitudinal verticalsection. Fig. 6 is a transverse vertical section.

Prior to my invention and use of a rigid metal base or bottom member forassayers balances and other scientific balances, the case within whichthe balances were housed, and the mechanical parts of the balance weremounted on a wooden base or one partially constructed of wood, andprovided with a slab, of dark colored glass or similar substance, as acovering for the base and frame work, forming the bottom. When the baseor frame work was subjected to theI usual climatic changes that occurthrough moisture, expansion and contraction, the mechanical parts of theinstrument were i frequentlyaiiected andthe glass or other covering*broken yto such 'fan extent as to render the instrument worthless forthe ac-v curate Aand delicate work required. c

I have invented and shown in the drawings herewith a metal base of onepart, constructed and braced toprevent warping and undue lexpansion-orcontraction, on which .the mechanical parts of the instrument aremounted and towhich a protectingr case for said parts is secured. Insaid drawings the metal base is sho-wn at A, and consists of arectangular frame 1, with depending internally threaded bosses 9: ateach corner thereof. Said frame'l has the central portion depressed orcut out to form a downward extended glass receiving and retain ingrecess, within which a dark colored glass or porcelain plate l isfastened with a cushioning support 5 thereunder of'plaster of Paris orsimilar substances. IIhe under side of said base A has portions thereofcut out to lighten the weight of said frame l, and to form transverse orend braces 6, and a longitudinal rear brace 7. Transverse drawer guides8 are fastened on the bot* tom of said base A within which guides thekdrawers 9 are operated. Said drawers are for holding the balance weightsand for the general convenience of the assayer or chemist. Within saidbosses 2 are inserted the 'externally and internally threaded sleevenuts 10 within which the adjusting or leveling screws 11 are operated.An opening 12 is cut in said plate 4: through which is inserted thestandard that supports or carries the mechanical parts of theinstrument. Said standard is rigidly secured to or in the bottom of saidbase A. It isV to be understood, that while I have shown and describedva rectangularly shaped base A, the invention is not to be confined tosuch forms alone, as any other shape that is desired may be used, alsoythat other slight changes may be made within the scope of the claims,

without departing from the spirit of the in- I therefore desire tosecure by Letters Patent and claim 1. In a device of the class describedthe combination with the case in which assay balances are housed of ametal base having a downwardly extended recess therein; depending bosseson the corners of said base; leveling screws operable in said bosses;and a plate cushioned in said recess having an opening through one sideportion thereof within which an assay balance is mounted.

2. In a device of the class described the combination with an assaybalance and housing therefor, of a metal base having a downwardly andthree upwardly extended recesses formed therein; depending internallythreaded bosses on the corners of said base; leveling screws operable insaid bosses; and a glass plate cushioned in said downwardly extendedrecess having an opening therethrough within which the balances aremounted.

3. A base for delicately poised instrw ments consisting of a metal framehaving a depression formed in the upper side; internally threadeddepending bosses on the corners of said frame; leveling means operablein said bosses; and a glass plate cushicned in said depression on aplane with the upper side of said frame and provided with an openingtherein through which the balance is inserted when secured to said metalframe.

In testimony whereof I have afliXed my signature in presence of twowitnesses.

"WILFRID HEUSSER.

Witnesses:

BEN L. CORUM, W; R. VUJLIAMS.

Copies ofvthis patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

